Hi, @martin-fowler–
Yes, there is an easy way to edit specimens. I would head to your profile icon in the upper right hand corner. This produces a dropdown that includes Specimens. Click on Specimens. This takes you to all of your uploaded specimens so you can edit them directly in there!
Or go ahead and follow this link: https://www.myfossil.org/members/martin-fowler/dwc_specimen/
Thanks for joining and I look forward to your contributions!
Jen